Walking cane



FIG. 1 is a side perspective view of a walking cane; and

FIG. 2 is a front plan view thereof; and

FIG. 3 is rear plan view thereof; and

FIG. 4 is a left side view thereof; and,

FIG. 5 is a right side view thereof.

The broken lines on the interior of the boot and the broken lines that surround the unclaimed surface ornamentation on the boot, form no part of the claimed design. 

CLAIM The ornamental design for a walking cane, as shown and described. 